Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.28
    OpenPayerNPI Medicare & MedicaidAnna Lok
    Ask Trek AI about this page

    Anna Lok — Billing Profile & Reimbursement Data

    NPI 1013090935 · Ann Arbor, MI · Gastroenterology Physician

    Customize your policy alerts

    Sign up for Anna Lok — Billing Profile & Reimbursement Data policy alerts

    Get alerted when relevant policies change without checking for updates manually.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    Anna Lok is a gastroenterology physician provider located in Ann Arbor, Michigan. This profile covers 3 Medicare and 0 Medicaid CPT/HCPCS procedure codes, with claims volume, average reimbursement, and total revenue by code, benchmarked against other providers billing the same services.

    Table of contents

    Progress1 / 7

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    Provider details (source: NPPES NPI Registry)

    FieldValue
    Entity TypeIndividual
    OrganizationAnna Lok
    Address1500 E Medical Center Dr
    CityAnn Arbor
    StateMI
    ZIP48109
    TaxonomyGastroenterology Physician
    NPI EnumeratedOctober 23, 2006

    Lifetime revenue by payer source (source: CMS Medicare & Medicaid claims data)

    Payer SourceTotal Paid
    Medicare$7.7K
    Medicaid$0

    Medicare: Total Revenue Breakdown by CPT/HCPCS Code

    Medicare revenue breakdown by CPT/HCPCS procedure code.

    View: Bar Chart1 / 2

    Medicare: Complete Services Breakdown

    The CPT/HCPCS codes generating the most Medicare revenue for this provider.

    3 rows

    CPT/HCPCS CodeDescriptionClaimsAvg PaidRevenue
    99214The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a moderate level of medical decision making, and/or the…80$80$5.8K
    99213The provider sees an established patient for an office visit or other outpatient visit involving evaluation and management. The visit involves a low level of medical decision making, and/or the…30$50$1.6K
    91200The provider uses elastography to determine whether tumors in the liver are nonmalignant or benign and to distinguish a lesion from normal tissue. Tumors show less elasticity or resumption of their…40$10$330

    Medicare: Competitive Analysis & Benchmarks

    How this provider's Medicare billing volume and revenue compare to other providers nationally and within its state, across 3 CPT/HCPCS codes.

    View: State1 / 2

    Full comparison — all codes billed, vs. state median

    3 rows

    CPT/HCPCS CodeRankProvider CountMedian ClaimsAvg PaidAverage Revenue
    992148,08515,47080$80$11.4K
    9921310,82114,81060$60$6.6K
    9120082030$10$400

    Related Providers

    Other providers that share a Tax Identification Number (TIN) with Anna Lok, ranked by combined Medicare and Medicaid revenue.

    ProviderStateTaxonomyMedicare RevenueMedicaid Revenue
    Mershed AlsamaraMIInternal Medicine Physician$296.2K$0
    Krishna IyerMNVascular & Interventional Radiology Physician$248K$0
    Carina ButlerMNDiagnostic Radiology Physician$160.4K$0
    Jonathan CrystalNYDiagnostic Radiology Physician$150.9K$3.3K
    Robert SmithVTDiagnostic Radiology Physician$154K$0
    William KarczewskiMNDiagnostic Radiology Physician$148.3K$0
    Charles HenryMNDiagnostic Radiology Physician$114.1K$14K
    Michael CarusoMNDiagnostic Radiology Physician$108.7K$9.4K
    Francis KigoziMNDiagnostic Radiology Physician$113.3K$0
    Jerome KleinMNDiagnostic Radiology Physician$110.6K$0

    Frequently Asked Questions

    References

    1. 1.Medicare Physician & Other Practitioner by Provider and Service. CMS.gov.Provider-level Medicare Part B utilization and payment data.
    2. 2.NPPES NPI Registry. CMS.gov.National Provider Identifier registry used for provider enumeration and taxonomy metadata.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

    Medicare Revenue by CPT/HCPCS Code
    Claims Volume vs. Michigan Distribution
    Anna Lok — 0 of 3 codes billed far more than typical (above p95)
    p5–p95 (all providers)p25–p75MedianThis providerOutlier
    Rank Distribution — Michigan